This is Decades, where the rock-fun will be grouped into themed areas based around, well, decades:

Named "Decades," the park would feature themed rides and attractions nestled in decade "lands" — the '60s would reflect the British Invasion and Motown influence whereas the '80s would emphasis the music-video age.

Aha, so managing to turn the place's one possible saving grace as a fun destination for all the family - a place where generations can come together and share their music - into a place where the different tiers of family will want to go to "their" part of the park, leading to rows, misery and sulking.